Picture a ramshackle house (like the one the "Waltons" lived in) and then imagine it populated by two sisters and a brother who progress ok until their early teens, then they start to regress - with varying degrees of maniacal behaviour. Is this dangerous? Well we need only ask poor old Mantan Moreland who never faced such dangers with "Charlie Chan" as he does in the opening scenes trying to deliver a letter to the house and... well... it's the last delivery he will ever make! Their only controlling influence is their chauffeur "Bruno" (Lon Chaney Jr.) but even he has his hands full when some...